Spinner bobbin



Jan. 24, 1939.

SPINNER BOBBIN Filed June 14, 1938 A ttorneys w. w. TEW 1 2,144,903 7 Patented Jan. 24, 1939 UNITED STATES PATENT OFFICE 2 Claims.

My invention relates to spinner bobbins and more particularly to improvements in flier blocks therefor.

According to the prevailing practice, flier blocks of spinner bobbins are mounted thereon so as to run, or revolve, after the bobbin has stopped rotating. This results in kinking of the threads carried by the guide arms of the flier block and for reasons which will be manifest.

Having the foregoing in mind, the object of my invention is to equip the usual spinner bobbin with a flier block arranged to stop when the bobbin stops while at the same time providing for relative rotation of the bobbin and block essential to proper tensioning of the threads in spinning.

Other and subordinate objects are also comprehended by my invention, all of which together with the precise nature of my improvement, will be readily understood from the succeeding description and claims when read in conjunction with the drawing accompanying and forming part of this specification.

In said drawing:

Figure 1 is a view in side elevation of a bobbin spindle and bobbimthe latter equipped according to my invention,

Figure 2 is a fragmentary view in longitudinal section taken on the line 2-2 of Figure 1 looking in the direction indicated by the arrows and drawn to an enlarged scale,

Figure 3 is a view in top plan of the bobbin and equipment associated therewith, and

Figure 4 is a detail view in transverse section taken through the lower end of the flier block.

Referring to the drawing by numerals, I designates the usual upwardly tapering bobbin spindle, 2 the usual spinner bobbin, with the exceptions presently noted, having the axial bore 3 by means of which said bobbin is frictionally fitted on the spindle l for rotation thereby, and 3 my improved flier block.

The bobbin 2, according to my invention, is provided in the upper end thereof with an axial circular recess 5 larger in diameter than the spindle I, and has formed in the upper face thereof a plurality of radial grooves 6 extending from said recess outwardly and equi-distantly. A circular sleeve I is fitted into the recess 5 and suitably se- 1 cured therein, said sleeve having a narrow internal flange 8 extending around its upper edge flush with the upper face of the bobbin 2. The grooves 6 accommodate coiled expansion springs, as at 5, each bearing at its inner end against a ball In seating under the urge of its spring in a circular seat provided in the sleeve 1, the arrangement being such that said balls II! when seated extend slightly into the sleeve 1. The grooves 6 are closed by an annulus l2 of suitable material fitting around the sleeve 1 and countersunk in the upper face of the bobbin 2 to which it may be secured by any suitable means.

Theflier block 4 is sleeve-like in form so that it fits loosely around the spindle I, said block comprising a button-like uper end l3, an intermediate laterally extending circular flange l4 adapted to bear against the flange 8 of the sleeve 1, upon which said block rotates, a lower end [5 extending into the sleeve 1 and adapted to clear the balls 10 with the exception of a laterally extending lug l6 thereon. The lug I6 is of a length such that in the seated position of the balls 10, said balls wipingly and frictionally engage the rounded outer edge I! of said lug for a purpose presently seen. As will be clear, thelug I6, 111 the assembled relation of the parts, underlies the flange 8 of the sleeve 1 so that the block 4 cannot fly off the spindle I. However, the diameter of the lower end 15 of the block 4 and the length of the lug l8 are so proportioned that when the bobbin 2 and block 4 are removed from the spindle I said lower end of said block may be withdrawn past the flange 8 of sleeve 1 by tilting the block 4 in the proper direction, thereby providing for detachment of the block 4 from the bobbin 2. The block 4 carries the usual guide arms l8 for the thread, which have their inner ends extended through raisedsockets IS in an arm carrying plate 20 seated on the flange 14. A keeper plate 2| is pressed against the inner ends of the arms I8 through the medium of a washer 22 and a split resilient keeper ring 23 seating in a groove 24 provided in the upper end of the block 4, said ring bearing against said washer.

As best shown in Figure 2, the inner end of each groove 6 is shaped to form an abutment shoulder 26 limiting movement of the ball ill in the unseated position of the latter.

Referring to the operation, under rotation of the bobbin 2, the balls [0 are moved outwardly into unseated position, under the action of centrifugal force, against the tension of the springs 9, whereby the bobbin 2 is free to rotate relatively to the flier block 4 as will be understood. However, when the bobbin stops, the balls H) are urged inwardly by the springs 9 into seated position in which they frictionally engage the edge I! of the lug Hi to stop rotation of the flier block 4 and parts carried thereby.

My invention will, it is believed, be readily understood from the foregoing explanation of the preferred embodiment thereof.

It is to be understood however, that the present disclosure is illustrative rather than restrictive, and that right is herein reserved to modifications in details of the invention as described and falling within the scope of the subjoined claims;

What I claim is:

1. In combination, a bobbin and a flier block, relatively rotatable, and means to frictionally lock said bobbin and block together against such rotation rendered ineffective under rotation of said bobbin and the action of centrifugal force and comprising a part on said block extending into said bobbin, and spring tensioned balls in said bobbin normally eifective to engage said part and movable radially and outwardly of said bobbin in opposition to the tension exerted thereagainst.

2. In combination, a bobbin and a flier block, relatively rotatable, and means to frictionally lock said bobbin and block together against such rotation rendered ineffective under rotation of said bobbin and the action of centrifugal force and comprising a part on said block, and spring tensioned balls mounted on said bobbin and normally effective to engage said part, said balls being movable radially and outwardly of said bobbin in opposition to the tension exerted thereagainst.

WILSON W. TEW. 

